Raspberry Pi 512mb Bad USB controller connection.

Is anyone else having the following issue:

I have discovered that there is a problem with the USB circuity. When-ever the device is touched on the USB controller (IC3), the device resets every thing attached to the USB circuit. When any device is removed or plugged into the device, the whole Raspberry Pi resets.

It is a real pain and I am sending my RPi back to be replaced.

Former Member over 12 years ago

IC3 contains the usb hub functionallity. If something goes wrong with it, it's normal that all usb devices fail.
There have been reports that the xtal of that chip sometimes had cold solder joints. It's X1 on the bottom of the board underneath that chip.
The Pi rebooting when you hotplug usb devices is caused by a dip in the power supply rail. The usb ports supply isn't decoupled very well.
So, likely a replacement board will show the same behavour.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
wallarug over 12 years ago in reply to Former Member

I never had this problem with any of my rev1 boards and no-one else seems to be having this problem.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
johnbeetem over 12 years ago

My guess is a bad IC connection or a broken trace on the PCB, so when you flex the board the slightest bit the connection opens. Lots of people have touched their LAN chips to measure temperature digitally and I've seen very few reports of anything like this, so RMA sounds good to me.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
wallarug over 12 years ago in reply to johnbeetem

I have sent the sales team @element14 an email to arange for a new one to be shipped to me. I got a similar response on the RaspberryPi forums as well (RMA).
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
Ramu over 12 years ago

I had this problem few times. I think it was 2 times when PI restarted when I touched USB port metal shield and few times when I inserted e new USB device. But it is not allways like this. Do not know why it hapened. Las tim I used it, it was all ok.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
wallarug over 12 years ago in reply to Ramu

I don't know what is going on.
Experiencing same behaviour as you.

See this: http://www.raspberrypi.org/phpBB3/viewtopic.php?uid=17587&f=28&t=20657&start=50

there seems to be multiple issues with 512MiB Raspberry Pis
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
morgaine over 12 years ago in reply to wallarug

Any official comment from RPF?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
wallarug over 12 years ago in reply to morgaine

None that I can see. I thought that the only person in the office was clive the slave?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
johnbeetem over 12 years ago in reply to wallarug

Fergus Byrne wrote:

I don't know what is going on.
Experiencing same behaviour as you.

See this: http://www.raspberrypi.org/phpBB3/viewtopic.php?uid=17587&f=28&t=20657&start=50

there seems to be multiple issues with 512MiB Raspberry Pis
Interesting thread. It sounds like a bunch of the RS RasPi's are "half-baked"

I really dislike BGAs. Cell phone makers love them because (1) they're small and (2) they're unreliable so you'll have to buy a new phone every 2 years. My parents still have a couple of Western Electric dial phones with 40-year MTBF. They have better sound quality than these newfangled electronic gizmos with their silly artificial inductors.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
wallarug over 12 years ago in reply to morgaine

Morgaine Dinova wrote:

Any official comment from RPF?
There should be one if this is a major issue (which it looks like). Maybe when they find some time they might give us more information.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel